Here are two scenarios, both probably quite unlikely.
1. Cumulus sells its Eugene stations to Townsquare, then uses that money to buy the Entercom stations in Seattle.
2. The same thing as #1 above, with the exception of 1090. That goes to Classic Radio, who also sells 98.1 to Cumulus, but leases the HD channels on that frequency. That would be quite interesting, as the KING calls would be returning to 1090.
Although Cumulus certainly has been mentioned as a prospect for the stations that Entercom is divesting, the problem is that Entercom wants to do swaps over cash sales for their divested properties.